Re: jewel/CephFS - misc problems (duplicate strays, mismatch between head items and fnode.fragst)

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On Sat, Oct 8, 2016 at 2:05 AM, Kjetil Jørgensen <kjetil@xxxxxxxxxxxx> wrote:
> Hi
>
> On Fri, Oct 7, 2016 at 6:31 AM, Yan, Zheng <ukernel@xxxxxxxxx> wrote:
>>
>> On Fri, Oct 7, 2016 at 8:20 AM, Kjetil Jørgensen <kjetil@xxxxxxxxxxxx>
>> wrote:
>> > And - I just saw another recent thread -
>> > http://tracker.ceph.com/issues/17177 - can be an explanation of most/all
>> > of
>> > the above ?
>> >
>> > Next question(s) would then be:
>> >
>> > How would one deal with duplicate stray(s)
>>
>> Here is an untested method
>>
>> list omap keys in objects 600.00000000 ~ 609.00000000. find all duplicated
>> keys
>>
>> for each duplicated keys, use ceph-dencoder to decode their values,
>> find the one has the biggest version and delete the rest
>> (ceph-dencoder type inode_t skip 9 import /tmp/ decode dump_json)
>
>
> If I do this - should I turn off any active ceph-mds while/when doing so ?
>

yes, please turn off mds

> Cheers,
> --
> Kjetil Joergensen <kjetil@xxxxxxxxxxxx>
> SRE, Medallia Inc
> Phone: +1 (650) 739-6580
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